JPS62184942A - Lamp control device for automobile - Google Patents

Abstract

PURPOSE:To suppress consumed power in head lamps, by deciding a signal from a light dimming instruction switch, which commands dimming of a beam of the head lamp, and a signal from an engine operation detecting switch and interrupting switching elements of the head lamps. CONSTITUTION:Switching elements 4 perform a voltage control in a range from 10% duty to 0% duty of voltages applied to head lamps 2a, 2b, and an interrupting pulse is supplied from a pulse generating means 7 on the basis of signals from an engine operation detecting switch 9 and from a light dimming instruction switch means 6. While the pulse generating means 7, which provides a light dimming inhibiting means 8, enables the dimming of a beam by the switching elements 4 to be released when necessary. In this way, a power loss is decreased small by a duty control through the switching elements 4, further consumed power can be suppressed by the dimming of a light beam.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention is directed to a vehicle whose headlights are lit by a battery, in which the headlights are dimmed and turned on in order to increase the presence of the vehicle. The present invention relates to a vehicle light control device that allows a vehicle whose dimmed light is on to be easily recognized from other vehicles located in the area.

[Conventional technology]

Conventionally, motorcycles are driven with their headlights turned on even during the daytime to increase the presence of the motorcycle and to prevent surrounding vehicles from interfering with the motorcycle's running.

On motorcycles, the headlights are turned on by a generator such as a magneto driven by the engine, and when increasing the presence during the day, the headlights are turned on with the same brightness as at night.

Motorcycles have fewer problems with batteries running out, and small motorcycles use magneto, so there are fewer problems such as headlights turning off and turning off.

On the other hand, in an automobile, an on-vehicle battery is used as a power source for an in-vehicle load, and a generator is used to charge the battery. In such automobiles, if the headlights are turned on at times other than night, similar to those of motorcycles, as described above, the problem arises that battery power is significantly consumed, causing the battery to run out.

In addition, in automobiles, the headlights can be turned on even when the engine is not running, so if the headlights are turned on during the daytime as described above, problems such as headlight fading may occur. many.

[Problem that the invention seeks to solve]

That is, the present invention provides a lighting control device for automobiles that turns on the headlights at times other than nighttime, similar to motorcycles, to make the surroundings aware of the presence of the automobile. The purpose of this is to solve the problem of wasting battery power or forgetting to turn off the headlights.

[Structure of the invention]

The first aspect of the present invention is to judge a signal from an engine operation detection switch that detects the operation of an automobile engine, such as an ignition switch, and a signal from a dimming command switch means that instructs to dim the headlights. The switching element is switched on and off. A pulse-like duty-controlled voltage is applied to the headlight by turning on and off the switching element, and the headlight is turned on at a lower level than at night.

[Effect]

As a result, a duty-controlled voltage is applied to the headlights via the switching element, so the power consumption of the headlights is low, and in this case, the amount of light (illuminance) that increases the presence of the car can be obtained. . Therefore, even if the headlights are turned on at times other than nighttime, such as when the surroundings are dim, there is less possibility that the battery will run out. In addition, the condition for the headlights to dim and turn on is that the car's engine is operating, that is, the generator driven by the engine is generating electricity.
For example, if the driver turns off the ignition switch and leaves the vehicle, the dimmed lighting is canceled and the battery will not run down.

〔Effect of the invention〕

As described above, according to the first configuration of the present invention, it is possible to dim the lighting by controlling the duty of the headlight switching element, so that the presence of the vehicle can be sufficiently recognized by the surroundings. Contributes to vehicle safety. Further, since the voltage is controlled by duty control using a switching element, there is little power loss, and the power consumption of the headlight is suppressed by dimming the lighting, so battery power is not wasted. In addition, when the engine stops, the dimming mode is canceled, so the headlights will no longer be turned on in a dimmed state when unnecessary, and from this point of view, the battery will drain due to forgetting to turn off the switch. can be prevented.

Next, the second configuration and effects of the present invention will be explained.

As mentioned above, if the headlights are dimmed to increase the presence of the vehicle, for example, when the vehicle enters a tunnel, it is possible to accidentally turn off the headlights when the normal function of the headlights is desired. There may be cases where the light continues to be on. In such cases, it is not possible to obtain sufficient forward visibility, so
If the driver notices that the normal headlight function is restored only after canceling the dimmed lighting using the operation switch, there will be a time delay and the operation will be cumbersome.

Therefore, in the second configuration of the present invention, dimming inhibiting means is provided in the pulse generating means for supplying the duty signal to the switching element. When the lighting/dimmer switch instructs to turn on the low beam or high beam of the headlights with the first voltage, this dimming prohibition means does not apply to the dimming lighting command means by the dimming command switch means. , prohibits the headlights from being turned on by the second voltage. In other words, priority is given to the operation of the lighting state similar to that during normal nighttime, other than dimming lighting.

As a result, in the second aspect of the present invention, there is no need for a troublesome switch operation when transitioning from the dimmed lighting state to the normal operating state of the headlights, and it is similar to turning on the headlights at night. If you operate the switch, the dimming state will be automatically canceled and the duty will be 100%, which is the same as turning on the headlights at night, that is, the light will be turned on without dimming, so the switch operation is easy and the necessary illumination can be obtained immediately. There is an effect.

〔Example〕

Next, one embodiment of the present invention will be described with reference to the drawings.

4 and 5 conceptually illustrate the operation of the embodiment to be described. In FIG. 4, 1 is a car, 2a and 2b are headlights provided in front of the car, 3 is a battery, and 4 is a switching element. This switching element 4 controls the voltage applied to the headlamp in a range from 100% duty to 0. Reference numeral 5 indicates a headlamp switch, and reference numeral 6 indicates a dimming command switch means, which is, for example, a switch provided on an instrument panel inside the vehicle.

FIG. 5 shows another operating state, and 7 is a pulse generating means, which can be constructed from a microcomputer, an IC circuit, or the like. And headlights 2a, 2
Inside b, low beam lamps 2aL, 2bL and high beam lamps 2aH, 2bH are provided, allowing switching between far and near vision. A first switching element 4a and a second switching element 4b are connected to the low beam lamp and the high beam lamp, respectively. Further, a dimming inhibiting means 8 is provided in the pulse generating means 7, and is configured to cancel dimming lighting by the switching element 4 when necessary. When this is necessary, for example, a car enters a tunnel while the lights are dimmed and the headlights are turned on at 100% duty.
This is when the headlamp switch 5 is operated in such a manner.

Reference numeral 9 in FIGS. 5 and 4 is an engine operation detection switch, which in this case is an ignition switch. This is usually configured as a key switch.

Examples will be specifically described below.

FIG. 1 is a partial electrical wiring diagram of this embodiment using a microcomputer, and FIG. 2 is a block diagram of this electrical wiring diagram. First, in FIG. 2, a signal from an ignition switch 9, which serves as an engine operation detection switch, is input to the input end of the microcomputer that constitutes the pulse generating means 7, and the well-known lighting and
A signal from the dimmer switch S is input. In addition, the first
In the figure, switches 5, 12, and 15 are schematically illustrated.

Further, signals from a first illumination intensity changeover switch 13 and a second illumination intensity changeover switch 14 provided on the instrument panel in the vehicle interior are connected to the input side of the computer 7.

The first illumination intensity changeover switch and the second illumination intensity changeover switch are manual switches operated by the driver.

In addition, 15 is a dimmer switch, which is a switch mechanism that instructs to switch the headlight light between high beam and low beam, and this is incorporated into the lighting/dimmer switch S as shown in Figure 2. ing. The signal from this dimmer switch 15 is also input to the input stage of the computer 7.

Reference numeral 16 denotes a monitor lamp, which is provided on the instrument panel to notify the driver when the lamp is dimmed and turned on.

17 is a drive circuit in which a first switching element 4a and a second switching element 4b are provided.

2a and 2b are headlights, each of which includes a low beam lamp and a high beam lamp.

Next, the control operation or flow chart of the microcomputer 7 shown in FIGS. 1 and 2 will be explained. This flowchart is as shown in FIG.

In this flowchart, when the driver issues an instruction to turn on the side marker lights and turns on the side marker lights or the headlights, even if the headlights are dimmed and turned on in the previous state. They are very dim and try to cancel out some of the lights.

Furthermore, in this embodiment, when the headlight is dimmed, the headlight is turned on using the filament on the low beam side. A monitor lamp indicating the dimming state is configured to blink.

Next, before going into specific operations, the circuit configuration shown in FIG. 1 will be briefly explained.

The battery 3 in FIG. 1 has a voltage of 12V, and the power supply for the microcomputer operates at 5V. 18 is a current control resistor, and 19 is a Zener diode that supplies a constant voltage to the microcomputer. 20, 21
．． 22 is an output port of the computer, 22 is a monitor lamp, and 20 is a transistor 2 constituting a buffer.
Connected to 3. Further, the output port 21 is connected to a transistor 24 that also constitutes a buffer.

To this° Sofa transistor 23.244! Since the output voltage from the output port is as low as 5■, the first
．． Since the field effect transistor forming the second switching element cannot be driven, it is used to drive this field effect transistor. That is, the configuration is such that the power supply voltage of the battery 3 is applied to the gate of the field effect transistor when the transistors 23 and 24 are turned off. 25 to 45 are resistors.

In this example, a field effect transistor, especially a so-called MO3 type FET, was used as the switching element in the output stage for duty-controlling the voltage applied to the headlamp, but this does not apply even if a normal bipolar transistor is used. It is configurable. However, considering power loss and the like, MO3 type FET is currently considered to be optimal. The rated current of this MO3 type FET is set to IOA, and the withstand voltage is set to 11 Ov or more. As described above, the headlights 2a and 2b are provided with a low beam lamp and a high beam lamp. For example, the low beam lamp 2 is provided with a low beam lamp and a high beam lamp.
aL, 2bL is about 55 (W), high beam lamp 2
For aH and 2bH, approximately 60 (W) is adopted. The low beam and high beam lamps are installed at slightly different positions in the headlight, and the angles at which the light beams reflected by the reflectors in the headlight are emitted are different from each other. It is designed to form a The indicator monitor lamp 16 uses a light emitting diode, and 25 is a current limiting resistor.

Next, the flowchart in FIG. 3 will be specifically explained. First, in step 101, it is determined whether the ignition switch is on or off. If the ignition switch is ON, step 102
Proceed to , and cancel the dimmed lighting. That is, if the dimmed lighting is in the dimmed lighting state at the time of this step, the dimmed lighting is canceled.

The reason why the step of canceling dimmed lighting in step 102 is necessary is as follows. That is, the dimming command switch means employed in this embodiment consists of a manual operation automatic return type dimming lighting switch provided on the instrument panel. Therefore, the switching operation of this switch is ON only while it is being pressed by hand. This ON operation is stored in advance in the computer, and in this step 102, this stored ON operation, that is, the dimmed lighting instruction is canceled. In addition, this manual operation automatic return type dimmer switch is configured so that when pressed once, it commands dimming, when pressed a second time, it cancels dimmed lighting, and when pressed a third time, it commands dimmed lighting. The dimming lighting command and the dimming release command are alternately stored in the memory circuit in the computer by the signal from the dimming lighting switch. However, if a dimming lighting cancellation command is issued at step 102, even if dimming lighting is stored in the memory, it is forcibly canceled. Next, after step 102, the process proceeds to step 103, where it is determined whether the headlamp switch is OFF or has been turned OFF. Then, if it is OFF or has been turned OFF, the answer is YES and the process proceeds to the next step 104, where a dimming lighting cancellation command is issued again. Regardless of the operation of the dim light switch, the memory within the computer cancels the dim light command. Also,
If the answer is NO to the question of whether the headlamp switch is OFF or has been turned OFF, that is, if the headlamp switch is ON or has been turned ON, the third
Proceed to the positive 2 floor shown in the figure (bl). Note that 104
The reason why step 104 is necessary is that even if the dimming switch on the instrument panel is operated and a dimming command is issued before step 104, it must be forcibly executed in the computer. This is because it is necessary to cancel and cancel the command.

Next, the process proceeds to step 105, where it is determined whether a passing operation command has been issued, that is, whether the passing switch has been turned on. The passing switch referred to here is a well-known one, and is usually built into the lighting/dimension inch S as shown in Figure 2, and is used when passing a car in front. It turns on the headlights intermittently. This passing switch mechanism is incorporated into the lighting/dimmer switch S, and in Fig. 2, the signal 50 is schematically shown.
It is entered as . And this passing command 50
When the computer recognizes that the light has appeared, the terminal (50) of the lighting/dimmer switch S is grounded by the passing operation of the lighting/dimmer switch S. Therefore, this passing switch mechanism can be used as is in existing automobiles. If the passing switch is not turned on, that is, if the answer is NO, the process proceeds to the next step 106. That is, in this state, the head lighting instruction is not issued, and the dimming isochi part is not instructing passing. That is, the terminal (5
), (50) are not grounded. In step 106, it is determined whether the memory in the computer is instructing dimmed lighting based on the command from the dimmed lighting switch. Note that this memory is stored in step 102. Step 10
4, and only when the dimming lighting switch provided on the instrument panel is turned on after cancellation, the dimming lighting command O is issued in step 106.
N becomes YES. If YES, the monitor lamp 16 becomes a dimmed lighting indicator.
Activate blinking. This is done in step 107.

Next, the process proceeds to step 108, where the dimmer switch memory is invalidated and the low beam is locked.

This can be explained in detail as follows. The dimmer switch is a switch operated by the driver, and the signals from it are input to the input side of the computer 7, as shown in FIG. This signal is stored in the computer's memory, and it remembers whether the dimmer switch has commanded high beam or low beam. However, in step 108, even if the dimmer switch memory stores a memory indicating the high beam side, it is invalidated and the memory is rewritten so that the memory indicates the low beam side. .

This step 108 is necessary because when dimming the headlights, the low beam side lamp with a small lamp capacity is used. This is to ensure that the voltage is applied.

Next, the process proceeds to step 109, and the T
Determine whether the illuminance selector switch is turned off. If all the changeover switches are in the OFF state, the answer is YES, and the process proceeds to step 200. In this case, the headlights are turned on with a low beam and an illuminance of 25%. In other words, the voltage applied to the headlight is controlled by the switching means 4a so that the headlight is turned on in a fairly dark manner.

Next, if NO in step 109, step 201
Then, it is determined whether the first illuminance changeover switch 13 shown in FIG. 2 has been turned on. If it is ON, YES
Then, proceed to step 202, and set the illuminance to 50 with low beam.
% lighting is performed.

Next, if NO in step 201, the second illuminance changeover switch 14 is ONL, so the switching means 4a switches the low beam of the headlights 2a and 2b so that the illuminance is 75% low beam. A duty-controlled voltage is applied to the lamp.

In the flow shown in FIG. 3(a), step 106
If the dimming lighting command is not stored in the computer, the process proceeds to step 210, in which case the headlights 2a and 2b are completely turned off. That is, the switching element 4 continues to be completely OFF.

Next, in step 105 above, if the pass switch is turned on, the high beam lamp is turned on at 100% illuminance. That is, during the time when the passing switch in the instrument panel is operated and turned ON, the process goes to step 211, the switching element 4b in FIG. 1 is kept in the ON state, and the high beam lamp 2aH is turned on.

2bH turns ON with a duty of 100%.

Next, if it is determined No in step 103,
In other words, if the headlamp switch is not OFF,
In a normal car, the instruction to turn on the side marker lights and the instruction to turn on the headlights are linked and operated by a single switch, so the headlights are turned on after the side marker lights are turned on. Therefore, it is time for the following operation. In other words, when the headlamp switch is not OFF, it is when the terminal (5) or terminal (50) in Figure 2 is grounded, and both the headlights and the side marker lights are on. . In this case, the process moves to the flow shown in FIG. 3(b) for Na2.

Next, the flow in part 2 of FIG. 3(b) will be explained.

In step 220, it is determined whether the side marker light switch is ON or ONL. And Y
At the time of ES, the dimmed lighting is canceled in the same way as steps 102 and 104. In other words, the computer is set in a state in which it does not issue a command for dimmed lighting. This step is performed by 221. Next, step 22
Step 2 turns on the vehicle side lights. Next, the process proceeds to step 223, where it is determined whether the passing switch is ON or OFF.

Note that this passing switch is configured with a self-return mechanism, so it is only necessary to determine whether it is currently ON or OFF. If it is ON, the process proceeds to step 224, where the headlights are turned on with high beams and illuminance of 100%. On the other hand, if the passing switch is OFF, the process proceeds to the -3 part of the flow. Note that Na3 is as shown in FIG. 3(a). The flow of l1kL3 in Figure 3 means that even if the operation switch is instructing only the side marker lights to be turned on, if the dimming switch is activated, it is possible to dim the lights. There is.

Next, if the result in step 220 is No, that is,
If the headlamp switch is not in the OFF state and the side marker light switch is not in the ON state, the lighting switch part shown in Figure 2 is operated to the position where the headlights are turned on, and terminals (5) and (5)
0) is ground.

In this case, the process proceeds from step 220 to step 225, and dimmed lighting is prohibited. Then step 22
6 and below, the switching lighting control between the high beam and low beam of the headlights, which is currently performed in a normal vehicle, is performed in the steps below. That is, step 2
At step 26, it is determined whether or not the passing switch is turned on. If it is turned on, the process proceeds to step 227, where the high beam is turned on with a headlight illuminance of 100%. If the passing switch is not turned on, the process advances to step 228 and the dimmer switch is turned on.
It is determined whether the dimmer switch indicated by 15 in FIG. 2 is pointing to the low beam side. If the dimmer switch 15 indicates the low beam side, the answer is YES, and the process proceeds to step 229, where the headlights are turned on with the low beam at 100% illuminance. Also, step 228
If the dimmer switch does not indicate the low beam side, proceed to step 230 and set the illuminance to 10 on the high beam.
Turn on the headlights at 0%.

Next, if the ignition switch is turned off in step 101 of FIG. 3(a), dimmed lighting is prohibited in step 240, and the flow advances to Nll. That is, when the ignition switch is not turned on, the engine 1a shown in FIG. 1 is not running, and the generator 3a driven by this engine is not generating electricity. In such a state, turning on the headlights even in a dimmed state will cause the battery to run out, so it is prohibited.

After step 240, the flow advances to Nll, where the headlights are controlled to be turned on and off in a state where the ignition switch is not turned on. If the headlamp switch is OFF in step 250, it is determined in step 251 whether the passing switch is ON. If the passing switch is not ON, the headlights are turned off.

That is, when the headlamp switch is OFF and the passing switch is OFF, the headlights are turned off. Also, in step 251, the passing switch is turned OFF.
If the result is N, the high beam is turned on at 100% illuminance in step 253. Next, in step 250, if the headlamp switch is not OFF, that is, if the headlamp switch is being operated, it is determined in step 254 whether the side marker light switch is ON.

If the width light switch is ON, step 255
If the vehicle width light switch is turned on, and the vehicle width light switch is not ON, proceed to block 4, that is, the flow part of block 4 in Figure 3 (BL).In this case, the headlamp switch is operated, In addition, the side marker light switch is not ON, and either the high beam illuminance is turned on with 100% illuminance due to the passing of 4, or the low high beam with 100% illuminance is turned on due to the dimming.In other words, in this case, the headlights are turned on. Lights are used to turn on low beams at 100% illuminance, high beams are turned on at 100% illuminance, or intermittent flashing is performed to turn on high beams at 100% illuminance.

The illuminance changeover switch is shown at 13.14 in Figure 2, and its signal is processed at 109, 201 in Figure 3(a), but these illuminance changeover switches are provided on the instrument panel and are A mechanism is adopted in which the first illuminance selector switch and the second illuminance selector switch cannot be turned on at the same time, and these can be configured by attaching such a commercially available mechanical switch.When the first illuminance selector switch is set to ONL, It is desirable to use a mechanical switch that does not allow the second illuminance changeover switch to be turned on. If such a mechanical switch were not used, if both the first illuminance changeover switch and the second illuminance changeover switch were turned on, it would not be possible to know which one to give priority to, and the computer would have to adjust the illuminance appropriately. You will have no choice but to judge. Therefore, when switch 13 is turned on, switch 1
It is desirable to employ a mechanical switch such that when switch 4 is released and switch 14 is turned on, switch 13 is released. Or these switches 13
．． As 14, a changeover switch may be adopted in which one switch is turned off and the other switch is turned on.

Next, the dimming/lighting switch 6 employs a manually operated automatic return type Wankutsu Senshiki switch. When this switch is pressed once, the signal is taken into the computer and stored as a dimming command, and when the switch is pressed a second time, the signal stored as the dimming command is canceled. Moreover, when the switch is pressed next time, it is memorized again as a dimming command. Further, even if a dimming command is stored by controlling a switch, it can be forcibly canceled by the control within the computer. Therefore, the dimming lighting switch 6 can be configured as a simple push button switch and is easy to operate. However, in such conditions, it is difficult for the driver to tell whether the light is dimmed or not, so an indicator using the monitor lamp 16 is provided on the instrument panel, and when the light is dimmed, the light emitting diode of the monitor lamp 16 blinks intermittently. That's what I do.

Next, the flow will be briefly explained once again in the claims.

Item 1 describes that an engine operation detection switch is provided to detect the operation of the automobile engine, but in this embodiment, the engine operation detection switch is an ignition switch. In other words, the engine was considered to be running when the ignition switch, also known as the key switch, was turned on.

As the engine operation detection switch, in addition to the key switch, it is also possible to use, for example, a hydraulic pressure switch or a switch operated by the voltage generated by the alternating current generator of the vehicle. Then, by controlling the duty of the switching element based on the signal from the engine operation detection switch and the signal from the dimming/lighting switch means,
When the engine operation detection switch does not detect engine operation, dimmed lighting is not performed by duty control. That is, this corresponds to the flow in which, in step 101 of the flowchart, it is determined whether the ignition switch is ON, and in step 240, when the ignition switch is not ON, dimming lighting is prohibited.

Next, in item 3, the headlamp switch controls the lighting state of the low beam lamp and high beam lamp, and switches between low beam light and high beam light.
Items with a high selector switch function are listed. This is because, in this embodiment, each mechanism of a passing switch or a dimmer switch is described in the embodiment as an existing well-known switch in which each mechanism of a passing switch or a dimmer switch is mechanically incorporated into a lighting/dimmer switch S. In item 3, when the headlamp switch commands to turn on the headlights at 100% duty, priority is given to turning on the headlights at 100% brightness, which is the conventional method, so that dimming does not occur. ing. Then, as in step 103°220.225, when the headlamp switch is in the OFF position or instructs only the side lights to turn on, that is, when the headlamp switch is at 10.0% of the headlight illuminance. The headlights can be turned on by dimming only when there is no command to turn on the headlights.

[Brief explanation of drawings]

FIG. 1 is an electrical wiring diagram used in an embodiment of the device of the present invention.
Figure 2 is a block diagram schematically showing the circuit shown in Figure 1;
The figure is a flowchart of the computer employed in the above embodiment, and FIGS. 4 and 5 are conceptual diagrams showing an overview of the operation of the above embodiment. 1...Car, la...engine, 2a, 2b...
- Headlight, 3a... Generator, 4... Switching element, 5... Headlamp switch, 6... Dimming command switch means, 7... Pulse generation means, 2aL, 2b
L... Lamp for low beam, 2aH, 2bH... Lamp for high beam, 4a, 4b... 1st. Second switching element, 8... Dimming prohibition means, 9... Engine operation detection switch, S... Lighting/dimmer switch.

Claims (4)

[Claims] (1) A plurality of headlights located in front of the vehicle at least on the left and right, a battery mounted on the vehicle that can be connected to supply current to the headlights, and a battery that connects the battery to the engine power of the vehicle. an engine operation detection switch that detects operation of the engine of the vehicle; a switching element connected between the headlamp and the battery; a headlamp switch that issues a command to apply a first voltage from a battery to the headlamp; when operated, the switching element is turned on and off to apply a second voltage having an effective value lower than the first voltage; dimming command switch means for issuing a command to turn on the headlight in a dimmed light; supplying intermittent pulses to the switching element according to a signal from the engine operation detection switch and a signal from the dimming command switch means; A lighting control device for an automobile, characterized in that it is equipped with a pulse generating means. (2) The pulse generating means is composed of a microcomputer, and the input of the computer receives a signal from the headlamp switch and a signal from the dimming command switch means, and the output of the computer operates the switching element. An automobile lighting control device according to claim 1, characterized in that: (3) A plurality of headlights located in front of the vehicle at least on the left and right, each having a low beam lamp and a high beam lamp, and the vehicle capable of being connected to supply current to the headlights. a switching element having a first switching element connected between the headlamp and the battery and connected to the low beam lamp; and a second switching element connected to the high beam lamp. , through the switching element by being operated,
A lighting/dimmer switch that applies a first voltage from the battery to the headlight, the lighting/dimmer switch controlling the lighting state of the low beam lamp and the high beam lamp among the headlights; A device having a low/high selector switch function for switching between low beam light and high beam light; when operated, the switching element is turned on and off, and a second voltage having an effective value lower than the first voltage is applied to the headlight. a dimming command switch means for applying a voltage to the headlight and dimming and lighting the headlight; the dimming command switch means and the lighting/dimmer switch are connected to an input side; the first switching element;
pulse generating means capable of supplying output pulses to the second switching element, respectively; provided in the pulse generating means, the lighting/dimmer switch generates a first voltage for low beam light or high beam light of the headlamp; For automobiles, the headlight has a dimming prohibition means for prohibiting the headlight from being turned on by the second voltage when the headlight is instructed to be turned on by the second voltage regardless of the dimming lighting command by the dimming command switch means. Light control device. (4) The dimming prohibition means in the pulse generation means is configured such that the headlamp switch in the lighting/dimmer switch is turned off.
When the headlights are not in the FF position and are not instructing to turn on the side marker lights, that is, when the headlights are being instructed to be turned on at 100% duty, the above-mentioned light is not in the FF position, regardless of the dimming lighting command by the dimming command switch means. 4. The automobile light control device according to claim 3, wherein the headlight is prohibited from being turned on by the second voltage.